Structural evolution characteristics and genesis of buried hill faults in the Chengdao–Zhuanghai area

The buried hills in the Chengdao–Zhuanghai area are rich oil and gas resources, their structures exhibit complex styles with unique evolutionary characteristics. Based on most recent exploration progress this region, structural characteristics active parameters of hill faults region were quantitatively analyzed using balanced section technique. In addition, evolution process study was reproduced by combining structural-physical simulation experiment. Its spatio-temporal genesis mechanisms also systematically investigated. As observed, developed three basic sets fault systems: NW-trending extensional strike-slip fault, NNE-trending left-handed compression–torsion near-EW-trending fault. further segmented into six hills: West Row Hill, Middle East Zhuanghai Buried Zhuangxi Changdi Hill. inner Hill is a that formed under influence right-lateral activity Chengbei Fault from Late Jurassic to Early Cretaceous. particular, regional compression stress field Tanlu zone. near-EW closely related near-SN extension Since late Triassic, has experienced stages, namely, overall uplift erosion (T 3 ), coating deposition (J 1+2 segmentation -K 1 extrusion differentiation (K 2 middle E), stable subsidence (N-Q). tectonic primarily controlled significant variations as well its adjacent areas since which field.